/* sample 1 */

*.warning {
    font-weight: bold;
}

/* sample 2 */

p.warning {
    font-weight: bold;
}

/* smaple 3 */

p.warning {
    font-weight: bold;
}

span.warnig {
    font-weight: bold;
}

/* sample 4 */

.warning {
    font-style: italic;
}

span.warning {
    font-weight: bold;
}